Question 307143
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A circle centered at *[tex \LARGE \left(h,\,k\right)] with radius *[tex \LARGE r] is described by the equation:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ (x\ -\ h)^2\ +\ (y\ -\ k)^2\ =\ r^2]


Rewrite your equation thus:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ (x\ -\ 9)^2\ +\ (y\ -\ 0)^2\ =\ 22^2]


And you can determine the answers by inspection.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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